Grenouille is an online service for weather data. All data can be obtained in JSON and displayed on a map. The Web application is based on Flask and uses PostgreSQL. It can be deployed on Heroku. An example of a client for the Yocto-Meteo sensor is provided.

MeteoIO is a C++ library whose main design goals are: providing meteorological data format/protocol independent data access; providing safe and robust I/O; making I/O code as unobtrusive and simple as possible for the user; providing ready to use data to the user (transparent caching, filtering, resampling, and spatial interpolation); enabling unattended use from an I/O point of view; offering high modularity so that individual elements of the library can easily be replaced/expanded/added; and by its modularity, help interdisciplinary development, each module being targeted at a specific developer profile.

ctraj is a Lagrangian transport library written in C++. It includes two-dimensional codes for basic atmospheric trajectory integration, semi-Lagrangian tracer simulation, and contour advection. It also includes a novel dynamical tracer reconstruction method called PC proxy.

The ECMWF GRIB API is an application program interface accessible from C and FORTRAN programs developed for encoding and decoding WMO FM-92 GRIB edition 1 and edition 2 messages. A useful set of command line tools is also provided to give quick access to GRIB messages.

wfrog is a Web-based weather station software with nice charts and many ways to publish them on the Web. The architecture is meant to make it very easy to add support for other weather station models and to allow for rendering the weather data in several formats and media using an extensible renderer structure. The processing and memory footprint of wfrog is very low, making it suitable to run on low-power equipment like PC-engine Alix, Cisco NLSU2, or SheevaPlug. The currently supported weather stations are Ambient Weather WS1080, Davis VantagePro, VantagePro2, Elecsa AstroTouch 6975, Fine Offset Electronics H1080, WH1081, WH1090, WH1091, WH2080, WH2081, Freetec PX1117, LaCrosse 2300 series, Oregon Scientific WMR100N, MR200, WMRS200, WMR928X, PCE FWS20, Scientific Sales Pro, Touch Screen Weather Station, Topcom National Geographic 265NE, Watson W8681, and any station using the WESTEP protocol.